birth of a planet

[wasi-uz-zaman]

hi experts
i know stellar evolution but how planet like earth is formed and how it has heavy elements does it is the remanant of supernova?

[Drakkith]

This should tell you most of what you wish to know: http://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System

[Said Harbieh]

Yes, it is believed that the all elements heavier than helium and hydrogen are remnants of supernovae. The most plausible cause in my opinion would be planetary nebula.